Materials Literature
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Longitudinal sound velocity of tetragonal hen-egg-white (HEW) lysozyme crystals was measured during air drying by ultrasonic pulseecho method. The sound velocity increases with exposure to open air and approaches a constant value. The maximum value is approximately 2900 m/s that is about 1.6 times as much as that of o…
Gold nanoclusters dispersed in TiO2(110) single crystal have been formed by 2 MeV Au2+ implantation to an ion fluence of 6.0×1016 cm−2 at 300 and 975 K followed by annealing at 1275 K for 10 h. The morphological features, size, crystallographic orientation of the Au nanoclusters with respect to the TiO2 matrix, and th…
The development of protein coating on 3D biodegradable scaffold based on electrostatic self-assembly (ESA) to promote osteoblast growth is reported. Poly (ethylenimine) (PEI) was employed to obtain a stable positively charged surface on poly(DL-lactide) (PDL-LA) substrate. An extracellular-matrix (ECM)-like biomacromo…
Co−Pb nanowire arrays with an average diameter of 20 nm and lengths up to several micrometers were grown in ordered anodic alumina templates using AC electrodeposition. The as-deposited samples were annealed at different temperatures. The structure and magnetic properties of Co−Pb nanowires were analyzed by X-ray diff…
Significant current interest exists in the catalytic growth of carbon (C) nanotubes on clusters of transition metal catalysts. Here we focus on the elemental energetics for the atomistic rate processes involved in the initial stages of the growth by studying a C atom on a nickel (Ni) magic cluster $({\mathrm{Ni}}_{38}…
A synthetic strategy for preparing artificial photosynthetic antenna−reaction center complexes based on formation of a benzene core via a Diels−Alder reaction has been applied to the preparation of a zinc porphyrin (P Zn )−free base porphyrin (P 2H )−fullerene (C 60 ) molecular triad. Spectroscopic studies in 2-methyl…
Nonlinear elastic properties and elastic instability of single-walled carbon nanotubes (SWNTs) under large-scale axial compression were investigated by molecular simulations using the second-generation Brenner potential. It was found that the energy changes of the nanotube can be closely fitted by a cubic function of…
Temperature-dependent photoluminescence (PL) of ZnO layers grown on 6H-SiC substrates has been described. The PL spectra were dominated by free exciton (FX) emission throughout the whole temperature range, which reflects shallow nonradiative centers in high crystalline ZnO layers. The temperature-dependent exciton pea…
We have measured the optical reflectivity $R(\ensuremath{\omega})$ of the quasi-one-dimensional conductor ${\mathrm{NbSe}}_{3}$ from the far infrared up to the ultraviolet between 10 and 300 K using light polarized along and normal to the chain axis. We find a depletion of the optical conductivity with decreasing temp…
Raw single-walled carbon nanotubes produced by arc discharge were first treated with K 2 S 2 O 8 in dilute H 2 SO 4 solution to generate oxygenated functional groups such as carboxyl, hydroxyl, and carbonyl on varying carbon components. Further functionalization with octadecylamine was carried out via a condensation r…
Abstract In this paper, the tensile deformation and fracture toughness of high‐density polyethylene (HDPE)/ethylene vinyl acetate (EVA) blends, obtained by dynamic packing injection moulding, have been comprehensively investigated in different directions of rectangle samples, including longitudinal, latitudinal and ob…
The magnetic structures of ${}^{153}{\mathrm{EuMn}}_{2}{\mathrm{Ge}}_{2}$ and ${}^{153}{\mathrm{EuMn}}_{2}{\mathrm{Si}}_{2}$ have been determined by neutron diffraction measurements (\ensuremath{\sim}1.8--723 K). The Mn sublattices of both ${\mathrm{EuMn}}_{2}{\mathrm{Ge}}_{2}$ and ${\mathrm{EuMn}}_{2}{\mathrm{Si}}_{2…
Abstract The pH-stabilisation method is a cost effective, reliable and environmental friendly way to control corrosion in gas/condensate pipelines where glycol is used as hydrate preventer. Increasing the pH to 6.5-7.5 facilitates the formation of a protective iron carbonate film on the steel surface and reduces corro…
Planar side gate devices are fabricated with epitaxial perovskite oxides by means of the voltage biased tip of an atomic force microscope. The high performance of the insulating gate barriers as well as the high dielectric permittivity of the chosen substrate are exploited to obtain a remarkable value of accumulated/d…
Large-scale fabrication of ordered arrays of carbon nanotubes (CNTs) on silicon substrate has been accomplished using a technique that combines the advantages of the electron-beam lithography (EBL) and template methods. The monodisperse diameters of the fabricated CNTs can be adjusted from about 5 to 100 nm. Using the…
Thin films of MoOx coated with platinum as a catalyst were prepared by dc magnetron sputtering from a molybdenum target in an oxygen and argon atmosphere. The films were colored and bleached by exposure to diluted hydrogen gas and air, respectively. In situ measurements of x-ray reflectance and substrate curvature wer…
First-principles calculations with projector augmented wave method has been carried out for Sr- and/or Mg-doped rhombohedral LaGaO 3 . The formation energies of 10 kinds of defects have been systematically computed in consideration of temperature and oxygen partial pressure. Sr 2+ ion is found to be stable at La site…
X-ray- and neutron-diffraction investigations of iodine intercalated single-walled carbon nanotubes are reported. Charge transfer between nanotubes and iodine leads to the formation of ${\mathrm{I}}_{n}^{\ensuremath{-}}$ species (mainly ${\mathrm{I}}_{3}^{\ensuremath{-}}$ and ${\mathrm{I}}_{5}^{\ensuremath{-}})$ as sh…
Abstract An integrated CO2 corrosion - multiphase flow model was built which takes into account the effect of most important variables. The model is mechanistic in nature and resides on clear theoretical foundations. All the assumptions in the model are explicitly stated and are open to future adjustments and improvem…
As-sputtered and melt-quenched amorphous structures together with the laser-induced crystallized structure of Ge-Sb-Te thin films were investigated using high-resolution electron microscopy (HREM) and nanobeam electron diffraction (NBED). Each of the Ge-Sb-Te thin films was embedded in a four-layered stack, which is t…